o1820.em.crucerisimo.com has no NS records.
NS records for this zone are defined at crucerisimo.com.
NS records for this zone are defined at crucerisimo.com.
Question and response
Question
dig o1820.em.crucerisimo.com. NS
Answer
The response has no answer records.
Authority
crucerisimo.com. 900 SOA ns1-09.azure-dns.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0